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Polish Journal of Management Studies > 2017 > Vol. 16, No. 1 > 7--20
Ekonomia i Zarządzanie > 2015 > Vol. 7, no. 3 > 35--49
Polish Journal of Management Studies > 2017 > Vol. 16, No. 1 > 7--20
Ekonomia i Zarządzanie > 2015 > Vol. 7, no. 3 > 35--49